:root {
  /* Primary Colors - Vibrant Blue-Purple */
  --auth-color-primary: #6366f1;
  --auth-color-primary-light: #818cf8;
  --auth-color-primary-dark: #4f46e5;
  --auth-color-primary-bg: #eef2ff;
  --auth-color-primary-border: #c7d2fe;

  /* Secondary Colors - Cool Gray */
  --auth-color-secondary: #64748b;
  --auth-color-secondary-light: #94a3b8;
  --auth-color-secondary-dark: #475569;
  --auth-color-secondary-bg: #f1f5f9;
  --auth-color-secondary-border: #e2e8f0;

  /* Surface Colors */
  --auth-bg-white: #ffffff;
  --auth-bg-gradient-start: #4f46e5;
  --auth-bg-gradient-end: #6366f1;
  --auth-color-surface: #ffffff;
  --auth-color-surface-elevated: #fafafa;

  /* Text Colors */
  --auth-text-primary: #0f172a;
  --auth-text-secondary: #475569;
  --auth-text-muted: #94a3b8;
  --auth-text-disabled: #cbd5e1;
  --auth-text-on-primary: #ffffff;

  /* Border Colors */
  --auth-border-color: #e2e8f0;
  --auth-border-light: #f1f5f9;
  --auth-border-medium: #cbd5e1;
  --auth-border-dark: #94a3b8;

  /* Success Colors */
  --auth-color-success: #10b981;
  --auth-color-success-light: #34d399;
  --auth-color-success-dark: #059669;
  --auth-color-success-bg: #d1fae5;
  --auth-color-success-border: #6ee7b7;
  --auth-color-success-text: #065f46;

  /* Danger Colors */
  --auth-error-bg: #fee2e2;
  --auth-error-border: #fca5a5;
  --auth-error-text: #991b1b;

  /* Utility Variables */
  --auth-border-radius: 12px;
  --auth-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  --auth-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --auth-spacing-xs: 4px;
  --auth-spacing-sm: 8px;
  --auth-spacing-md: 12px;
  --auth-spacing-lg: 16px;
  --auth-spacing-xl: 24px;
  --auth-spacing-2xl: 32px;
  --auth-transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--auth-font-family);
  background: linear-gradient(135deg, var(--auth-bg-gradient-start) 0%, var(--auth-bg-gradient-end) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--auth-spacing-lg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.auth-container {
  background: var(--auth-bg-white);
  border-radius: var(--auth-border-radius);
  box-shadow: var(--auth-shadow);
  padding: var(--auth-spacing-2xl);
  max-width: 420px;
  width: 100%;
  animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.auth-header {
  text-align: center;
  margin-bottom: var(--auth-spacing-xl);
}

.auth-logo {
  font-size: 48px;
  margin-bottom: var(--auth-spacing-md);
  display: block;
}

.auth-header h1 {
  color: var(--auth-text-primary);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: var(--auth-spacing-sm);
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.auth-header p {
  color: var(--auth-text-secondary);
  font-size: 15px;
  line-height: 1.5;
  font-weight: 400;
}

.auth-errors {
  background: var(--auth-error-bg);
  border: 1px solid var(--auth-error-border);
  border-radius: var(--auth-border-radius);
  padding: var(--auth-spacing-md) var(--auth-spacing-lg);
  margin-bottom: var(--auth-spacing-xl);
  color: var(--auth-error-text);
  font-size: 14px;
  animation: shake 0.5s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.auth-errors ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.auth-errors li {
  margin-bottom: var(--auth-spacing-sm);
  line-height: 1.5;
  display: flex;
  align-items: flex-start;
  gap: var(--auth-spacing-sm);
}

.auth-errors li:last-child {
  margin-bottom: 0;
}

.auth-errors li::before {
  content: "•";
  font-weight: 600;
  flex-shrink: 0;
}

.auth-form {
  margin-bottom: var(--auth-spacing-xl);
}

.auth-form-group {
  margin-bottom: var(--auth-spacing-lg);
}

.auth-form-group:last-child {
  margin-bottom: 0;
}

.auth-form-group label {
  display: block;
  color: var(--auth-text-primary);
  font-weight: 600;
  margin-bottom: var(--auth-spacing-sm);
  font-size: 14px;
}

.auth-form-group input {
  width: 100%;
  padding: var(--auth-spacing-md) var(--auth-spacing-lg);
  border: 1px solid var(--auth-border-color);
  border-radius: 8px;
  font-size: 15px;
  transition: all var(--auth-transition);
  outline: none;
  font-family: inherit;
  background-color: white;
}

.auth-form-group input:focus {
  border-color: var(--auth-color-primary);
  box-shadow: 0 0 0 3px var(--auth-color-primary-bg);
}

.auth-form-group input:focus-visible {
  outline: 2px solid var(--auth-color-primary);
  outline-offset: 2px;
}

.auth-form-group input::placeholder {
  color: #94a3b8;
}

.auth-button {
  width: 100%;
  padding: var(--auth-spacing-md) var(--auth-spacing-xl);
  background: var(--auth-color-primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--auth-transition);
  margin-bottom: var(--auth-spacing-lg);
  font-family: inherit;
  letter-spacing: 0.01em;
  min-height: 44px;
  min-width: 44px;
}

.auth-button:hover {
  background: var(--auth-color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.auth-button:active {
  transform: translateY(0);
  box-shadow: 0 1px 3px rgba(99, 102, 241, 0.3);
}

.auth-button:focus-visible {
  outline: 2px solid var(--auth-color-primary);
  outline-offset: 2px;
}

.auth-button:disabled {
  background: #94a3b8;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.auth-link {
  text-align: center;
  font-size: 14px;
  color: var(--auth-text-secondary);
}

.auth-link a {
  color: var(--auth-color-primary);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--auth-transition);
}

.auth-link a:hover {
  color: var(--auth-color-primary-dark);
  text-decoration: underline;
}

.auth-password-hint {
  font-size: 13px;
  color: var(--auth-text-secondary);
  margin-top: var(--auth-spacing-sm);
  line-height: 1.5;
}

.auth-password-hint ul {
  list-style: none;
  padding-left: 0;
  margin-top: var(--auth-spacing-sm);
}

.auth-password-hint li {
  padding-left: var(--auth-spacing-lg);
  position: relative;
  margin-bottom: var(--auth-spacing-xs);
}

.auth-password-hint li:last-child {
  margin-bottom: 0;
}

.auth-password-hint li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--auth-text-secondary);
}

.auth-password-hint li.valid {
  color: var(--auth-color-success);
}

.auth-password-hint li.valid::before {
  content: "✓";
  color: var(--auth-color-success);
}

.auth-loading {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
  margin-right: var(--auth-spacing-sm);
  vertical-align: middle;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 768px) {
  .auth-container {
    padding: var(--auth-spacing-xl) var(--auth-spacing-lg);
  }

  .auth-header h1 {
    font-size: 26px;
  }
}

@media (max-width: 480px) {
  body {
    padding: var(--auth-spacing-md);
  }

  .auth-container {
    padding: var(--auth-spacing-xl) var(--auth-spacing-lg);
  }

  .auth-header h1 {
    font-size: 24px;
  }

  .auth-button {
    padding: var(--auth-spacing-sm) var(--auth-spacing-lg);
    font-size: 15px;
  }
}

/* Clases para validación de password */
.form-control-error {
  border-color: var(--auth-error-border) !important;
  background-color: var(--auth-error-bg) !important;
}

.form-control-valid {
  border-color: var(--auth-color-success) !important;
}

.btn-disabled {
  opacity: 0.5 !important;
  cursor: not-allowed !important;
}